diff --git a/makefile b/makefile
index 46be841e..065f94a2 100644
--- a/makefile
+++ b/makefile
@@ -39,7 +39,7 @@ ifeq ($(shell which lilypond),)
   LILYFILE=''
 else
   LILYPOND=lilypond
-  LILY_SRC=$(wildcard lilypond/*.ly)
+  LILY_SRC:=$(wildcard $(LIBRARY)/lilypond/*.ly)
   LILYFILE=$(LILY_SRC:%.ly=%.pdf)
 endif